InstallUninstallTest is taking 20 minutes to run

Rediscovered this issue via 📌 [PP-1] Reduce test pipeline times to around 18 minutes and always report back unit tests Closed: duplicate . InstallUninstallTest singlehandedly adds about 20% to test times (once a full test run on gitlab takes 17 minutes, InstallUninstallTest is responsible for 1 or 2 of that because it's just so slow that it's still running when everything else has finished). I think it's time to drop it. We've got a lot more test coverage than when it's added, and the config API means modules do a lot less API calls on install, they can ship config for a lot of things that used to require PHP.

InstallUninstallTest was removed in 📌 Add GenericModuleTestBase and use it to test general module things Downport